Just a week before the season premiere, Nickelodeon has released the official trailer for The Legend of Korra -- Book 4: Balance, the final chapter of the cult-favorite animated series.

A sequel to Avatar: The Last Airbender, The Legend of Korra premiered on Nickelodeon in 2012, and centers on Aang's reincarnation as the Avatar. The third season experienced a series of distribution problems, including episode leaks and an accelerated broadcast schedule, before the show was abruptly moved online in July.

Book 4, which asks "Can Korra maintain balance in a world that is rapidly changing?," will premiere online Oct. 3, with new episodes following each Friday.